Rudenko theme

Two (or more) threats from one phase appear as mates in variations in subsequent phase(s).

Scheme:
1.X ~ 2.AB
1.Y a 2.A, 1…b 2.B
(2 phases)

Scheme:
1.X ~ 2.AB
1.Y a 2.A
1.Z b 2.B
(3 phases)

Rudenko theme – reversal form

Scheme:
1.X ~ 2.AB, 1…a 2.C, 1…b 2.D
1.Y a 2.A, 1…b 2.B
(2 phases)

Scheme:
1.X ~ 2.AB, 1…a 2.C, 1…b 2.D
1.Y a 2.A
1.Z b 2.B
(3 phases)

Mażul, Waldemar
Die Schwalbe, 2000
3rd Prize
FIDE Album 1998-2000

mate in 2 moves